<template>
  <view class="viewport">
      <!-- 推荐封面图 -->
      <view class="cover">
          <image :src="bannerPicture"></image>
      </view>
      <!-- 推荐选项 -->
      <view class="tabs">
        <text class="text" :class="index === activeIndex? 'active': ''" v-for="item,index in subTypes" :key="item.id" @tap="activeIndex = index">{{ item.title }}</text>
      </view>
      <!-- 推荐列表 -->
      <scroll-view v-for="item,index in subTypes" :key="item.id" v-show="activeIndex === index" scroll-y class="scroll-view" @scrolltolower="onScrolltolower">
          <view class="goods">
              <navigator
              hover-class="none"
              class="navigator"
              v-for="goods in item.goodsItems.items"
              :key="goods.id"
              :url="`/pages/goods/goods?id=${goods.id}`"
              >
              <image
                  class="thumb"
                  :src="goods.picture"
              ></image>
              <view class="name ellipsis">{{ goods.name }}</view>
              <view class="price">
                  <text class="symbol">¥</text>
                  <text class="number">{{ goods.price }}</text>
              </view>
              </navigator>
          </view>
          <view class="loading-text">{{ item.isFinish ? '已经到底了~' : '正在加载中...' }}</view>
      </scroll-view>
  </view>
</template>

<script setup lang="ts">
import { ref, onMounted } from "vue";
import { onShow } from "@dcloudio/uni-app";
//@ts-ignore,引入请求函数
import { reqHotRecommend } from "@/services/hot";
//@ts-ignore,引入类型约束
import type { SubTypeItem } from "@/types/hot";


//vue生命周期
onMounted(()=>{
  getHotRecommendData();
})

//推荐封面图
const bannerPicture = ref("");
//推荐选项
const subTypes = ref<(SubTypeItem & {isFinish?:boolean}) []>([]);
//当前选项高亮
const activeIndex = ref(0);

//获取页面的路由参数,在uni生命周期onLoad()、defineProps中都可以接收到
const props = defineProps(['type']);
// 自定义数据热门推荐页 标题和url
const hotMap = [
  { type: '1', title: '特惠推荐', url: '/hot/preference' },
  { type: '2', title: '爆款推荐', url: '/hot/inVogue' },
  { type: '3', title: '一站买全', url: '/hot/oneStop' },
  { type: '4', title: '新鲜好物', url: '/hot/new' },
]
//找出当前对应的类别
const currentType = hotMap.find((item)=>{
  return item.type === props.type;
})

//设置导航栏标题
uni.setNavigationBarTitle({title:currentType?.title as string});

//获取热门推荐的数据
const getHotRecommendData = async () => {
  const res = await reqHotRecommend(currentType!.url,{
    page:import.meta.env.DEV ? 33 : 1,  //方便调试
    pageSize:10
  });
  bannerPicture.value = res.result.bannerPicture;
  subTypes.value = res.result.subTypes;
  console.log("热门推荐api",res);
}

//推荐列表滚动条触底事件
const onScrolltolower = async () => {
  //获取当前选项
  const currentSubTypes = subTypes.value[activeIndex.value];
  currentSubTypes.goodsItems.page ++ ;
  if(currentSubTypes.goodsItems.page > currentSubTypes.goodsItems.pages){
    //没有更多数据了
    currentSubTypes.isFinish = true;  //添加一个数组是否加载完毕的属性
    return uni.showToast({icon:'none',title:"没有更多数据了~"});
  }
  let res = await reqHotRecommend(currentType!.url,{
    subType:currentSubTypes.id,
    page:currentSubTypes.goodsItems.page,
    pageSize:currentSubTypes.goodsItems.pageSize
  })
  console.log("热门推荐api",res);
  //新的列表选项
  const newSubTypes = res.result.subTypes[activeIndex.value];
  //数组追加
  currentSubTypes.goodsItems.items.push(...newSubTypes.goodsItems.items);
}
</script>

<style scoped lang="scss">
page {
  height: 100%;
  background-color: #f4f4f4;
}
.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}
.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;
  position: absolute;
  left: 0;
  top: 0;
}
.scroll-view {
  height: 100%;
  position: fixed;
  flex:1;
}
.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
  .text {
    margin: 0 20rpx;
    position: relative;
  }
  .active {
    &::after {
      content: '';
      width: 40rpx;
      height: 4rpx;
      transform: translate(-50%);
      background-color: #27ba9b;
      position: absolute;
      left: 50%;
      bottom: 24rpx;
    }
  }
}
.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;
  .navigator {
    width: 345rpx;
    padding: 20rpx;
    margin-top: 20rpx;
    border-radius: 10rpx;
    background-color: #fff;
  }
  .thumb {
    width: 305rpx;
    height: 305rpx;
  }
  .name {
    height: 88rpx;
    font-size: 26rpx;
  }
  .price {
    line-height: 1;
    color: #cf4444;
    font-size: 30rpx;
  }
  .symbol {
    font-size: 70%;
  }
  .decimal {
    font-size: 70%;
  }
}

.loading-text {
  width: 100%;
  height: 300rpx;
  text-align: center;
  font-size: 28rpx;
  color: #666;
  padding: 20rpx 0 50rpx;
}
</style>